The patch titled
Subject: msync: fix incorrect fstart calculation
has been added to the -mm tree. Its filename is
msync-fix-incorrect-fstart-calculation.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/msync-fix-incorrect-fstart-calculation.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/msync-fix-incorrect-fstart-calculation.patch
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------------------------------------------------------
From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Subject: msync: fix incorrect fstart calculation
Fix a regression caused by 7fc34a62ca ("mm/msync.c: sync only the
requested range in msync()").
xfstests generic/075 fail occured on ext4 data=journal mode because the
intended range was not syncing due to wrong fstart calculation.
Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Ashish Sangwan <a.sangwan@xxxxxxxxxxx>
Reported-by: Eric Whitney <enwlinux@xxxxxxxxx>
Tested-by: Eric Whitney <enwlinux@xxxxxxxxx>
Acked-by: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx>
Reviewed-by: Lukas Czerner <lczerner@xxxxxxxxxx>
Tested-by: Lukas Czerner <lczerner@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/msync.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN mm/msync.c~msync-fix-incorrect-fstart-calculation mm/msync.c
--- a/mm/msync.c~msync-fix-incorrect-fstart-calculation
+++ a/mm/msync.c
@@ -78,7 +78,8 @@ SYSCALL_DEFINE3(msync, unsigned long, st
goto out_unlock;
}
file = vma->vm_file;
- fstart = start + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
+ fstart = (start - vma->vm_start) +
+ ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
fend = fstart + (min(end, vma->vm_end) - start) - 1;
start = vma->vm_end;
if ((flags & MS_SYNC) && file &&
_
Patches currently in -mm which might be from namjae.jeon@xxxxxxxxxxx are
msync-fix-incorrect-fstart-calculation.patch
linux-next.patch
fat-add-i_disksize-to-represent-uninitialized-size-v4.patch
fat-add-fat_fallocate-operation-v4.patch
fat-zero-out-seek-range-on-_fat_get_block-v4.patch
fat-fallback-to-buffered-write-in-case-of-fallocated-region-on-direct-io-v4.patch
fat-permit-to-return-phy-block-number-by-fibmap-in-fallocated-region-v4.patch
documentation-filesystems-vfattxt-update-the-limitation-for-fat-fallocate-v4.patch
--
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